The WHOBO results are merely being used as an evidence of a problem that was brought out months ago and is unlikely to go away soon.
Metaknight, having no bad matchups, and arguably no even matchups as well (Snake and Wario are the only ones that can be argued, and Wario can't deal with planking at all and has bad stages and Snake is likely in MK's favor- judging from M2K vs Ally and my discussions with Ally on the topic, as well as the fact that the top MK's outplace the top Snakes), cannot be counterpicked, and is, in fact, his own worst matchup.
Play a character with a poor matchup on Metaknight? On any other character, the answer is to counterpick. Develop a set of secondaries to deal with your bad matchups. With Metaknight in the picture, this becomes bleak. You can simply get good at the matchup, but you can't count on being able to beat the top Metaknights in the country that know your character's matchup as well as you know theirs.
Best solution? Switch to MK, or second MK. It removes all of your bad matchups, including MK himself.
Is it any coincidence that the vast majority of the top players main or second MK? FICTION CP's MK on some matchups. DEHF takes MK on DSF at times. Then, of course, there's DSF himself, as Snake/MK.
We're going to keep seeing more and more MKs, as players realize that by switching from their mains to MK, they lose their bad matchups and see an improved performance in tournament results. Players with characters with bad MK matchups almost have no choice but to switch to MK- look at the dwindling numbers of ROB players.
MK is a cancer. He vastly overcentralizes the metagame by removing a counterpick system, and it's better for the metagame to remove him.
I've considered this heavily, actually, and I don't believe it to be a problem. With MK banned, a counterpick system develops, as a lot of the other top characters that have reasonable matchups on MK are lucky enough to have counters that don't make it past MK.
Falco has disadvantaged matchups to Pikachu (buffered 90% CG anyone?), Ice Climbers (see FICTION vs DEHF), Kirby, and Lucario at the very least. Interestingly, all of these characters are vastly underrepresented in the tournament scene.
Snake? Dedede, Olimar (forces him to approach), Pikachu (buffered CG pushes this over from even), Wario, ROB, and Falco all can be argued to have an advantage, and others may go even (ZSS? DK? Diddy?).
Dedede? Olimar, Falco, Pikachu (again the new buffered CG), and Ice Climbers.
Game & Watch? Snake, Marth, Diddy.
All of the top characters have counters! Interestingly, heavily underused characters like Pikachu, Kirby, and ICs would do very well in this environment, functioning as the counters for some heavily used characters. A counterpick system means players would play more characters and further develop the metagame, and we'd have a thriving, varied metagame.
And DEHF's lost to FICTION's.